welcome to the community!
You cannot do what you described with Forma Lms functions.
I'm giving you my 2 cents, although I am not a developer I have seen many of these ideas in the past.
Even if you want to do a custom development to achieve that, it's not very simple from a logical point of view. It's also not easy to design: how would you do that if your LO is for example a pdf (that opens in the user's local drive?)
If the LO is something built with the LMS tools it could be a little easier (the button would have to reference the next object in the same course).
If the LO is a scorm object, you would have to modify the scorm player to include the button.
In the past we did something a little bit similar to what you want, by using an html page with an iFrame linking to the 4 scorms included in the course. And having the course play directly the first LO upon accessing the course.